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Next to the coolant reservoir... black hose sticking forward with a plastic screw in it...
the best way to "bleed" any clutch is to get a can with a pump and a hose that will fit over the bleed screw. Loosen the bleed screw put the hose over it and pump fluid back up to the master cylinder this will force any air out.
If the cooling system is working properly, it will bleed itself.
A 2000 Lincoln LS has a control valve located inside the engine compartment, on the passenger side. There are five hoses that connect to the heater control valve which also has two cylinders that rest on top of it.
heater core may be leaking or hole in floor
The mechanic at the shop indicated that there was no bleed screw on the 200 Ford Explorer. This problem was resolved by starting the car (not driving it) and allowing it to run a little. The machanic did advise us to not allow the car to overheat.
most of the time it the heater control unit on the motor not the heater core had same problem
Mounted At Oil Filter, Threaded/Screw In.
Most often this is an air trap in the heater core. It is surprising how often mechanics (even at dealerships) don't understand how to bleed the cooling system properly. This is best done with a cool engine. Remove the cap from the expansion tank, turn your heater all the way up with the fan running, start the engine and fill the expansion tank to the top. The bleed screw for the cooling system (for the V6) is directly beneath the induction pipe, between the throttle body and the air filter. There is a black plastic manifold with several radiator hoses running from it, the bleed screw is facing upward and requires a 90 deg turn anti-clockwise. Open the bleed screw and let some fluid escape, top up the expansion tank and give the engine a gentle rev (2000rpm) and hold it there a few seconds, top up the tank again. Repeat a couple of times and your car will be getting hot inside. Enjoy
It could be the heater valve which is located under the hood to the passenger side down below the radiator and fan units.
valve cover gaskets valve cover gaskets
It is hidden on the intake near where the upper radiator hose attaches.